logiguard fork: GPUI xdg-activation keyboard-focus serial fix

Single-commit orphan branch: full zed-industries/zed @ 8c74db0 source tree
with a 3-file patch applied (no upstream history).

Patch (crates/gpui_linux/src/linux/wayland/):
  - serial.rs: add SerialKind::KeyboardEnter
  - client.rs: store wl_keyboard.enter serial; add latest_serial_of()
  - window.rs: activate() uses keyboard-enter serial (Mutter focus gate)

Mutter honors window activation only when the token carries the keyboard-
focus serial from wl_keyboard.enter; GPUI used a stale mouse-press serial.
See docs/tray-window-focus-wayland.md in logiguard.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

docs/theme/page-toc.js

@@ -0,0 +1,112 @@
+let scrollTimeout;
+
+const listenActive = () => {
+  const elems = document.querySelector(".pagetoc").children;
+  [...elems].forEach((el) => {
+    el.addEventListener("click", (_) => {
+      clearTimeout(scrollTimeout);
+      [...elems].forEach((el) => el.classList.remove("active"));
+      el.classList.add("active");
+
+      scrollTimeout = setTimeout(() => {
+        scrollTimeout = null;
+      }, 100);
+    });
+  });
+};
+
+const autoCreatePagetoc = () => {
+  const main = document.querySelector("#content > main");
+  const content = Object.assign(document.createElement("div"), {
+    className: "content-wrap",
+  });
+  content.append(...main.childNodes);
+  main.prepend(content);
+  main.insertAdjacentHTML(
+    "afterbegin",
+    '<div class="toc-container"><nav class="pagetoc"></nav></div>',
+  );
+  return document.querySelector(".pagetoc");
+};
+
+const getPagetoc = () =>
+  document.querySelector(".pagetoc") || autoCreatePagetoc();
+
+const updateFunction = () => {
+  if (scrollTimeout) return;
+
+  const headers = [...document.getElementsByClassName("header")];
+  if (headers.length === 0) return;
+
+  const threshold = 100;
+  let activeHeader = null;
+
+  for (const header of headers) {
+    const rect = header.getBoundingClientRect();
+
+    if (rect.top <= threshold) {
+      activeHeader = header;
+    }
+  }
+
+  if (!activeHeader && headers.length > 0) {
+    activeHeader = headers[0];
+  }
+
+  const pagetocLinks = [...document.querySelector(".pagetoc").children];
+  pagetocLinks.forEach((link) => link.classList.remove("active"));
+
+  if (activeHeader) {
+    const activeLink = pagetocLinks.find(
+      (link) => activeHeader.href === link.href,
+    );
+    if (activeLink) activeLink.classList.add("active");
+  }
+};
+
+document.addEventListener("DOMContentLoaded", () => {
+  const pagetoc = getPagetoc();
+  const headers = [...document.getElementsByClassName("header")];
+
+  const nonH1Headers = headers.filter(
+    (header) => !header.parentElement.tagName.toLowerCase().startsWith("h1"),
+  );
+  const tocContainer = document.querySelector(".toc-container");
+
+  if (nonH1Headers.length === 0) {
+    if (tocContainer) {
+      tocContainer.classList.add("no-toc");
+    }
+    return;
+  }
+
+  if (tocContainer) {
+    tocContainer.classList.add("has-toc");
+  }
+
+  const tocTitle = Object.assign(document.createElement("p"), {
+    className: "toc-title",
+    textContent: "On This Page",
+  });
+
+  pagetoc.appendChild(tocTitle);
+
+  headers.forEach((header) => {
+    const link = Object.assign(document.createElement("a"), {
+      textContent: header.text,
+      href: header.href,
+      className: `pagetoc-${header.parentElement.tagName}`,
+    });
+    pagetoc.appendChild(link);
+  });
+
+  updateFunction();
+  listenActive();
+
+  const pageElement = document.querySelector(".page");
+  if (pageElement) {
+    pageElement.addEventListener("scroll", updateFunction);
+  } else {
+    window.addEventListener("scroll", updateFunction);
+  }
+});